Henak, Richard M. Lesson planning for meaningful variety in teaching / Richard M. Henak. - 2nd ed. - Washington, D.C. : National Education Association, 1984. - 127 p. : ill. - Reference & resource series . Includes bibliographical references. ISBN: 0810615150 (pbk.) LCCN: 83024437 Subjects--Topical Terms: Teaching. Dewey Class. No.: 371.3